Railway traffic controlling system



F. L. ODGSON RAILWAY TRAFPIC GONTROLLING SYSTBM origina1 Filed oct. 3,1928 open only if said oonroI TeIay and said switoh nachine aSSoInecorresponding positions.

21. In a oontro1 SySten1 101' SWitch InachineS, the con1binotion vvith aSvvitch Inaohine, a con tro1 relay aSSociated vvith said switchInaohine, an electro-TeSponsive device fo1 oontro11ing Said Switchn1achine and oontro11ed by ad ciTouit in cloding au rSt oontaot of SaidcontTo1 Telay, and a second contao inoloded in said oirouit open WheSaid Svvitch Inachine and contro1 Telay aS suIne coTTeSpondingpositions, Whereby Said oiT cuit oannot be closed by accidenta1 bTidgingof Said TSt oontact.

22. In 3d control Systen for Svvitoh Inaohines fol' Tailroads, theooInbination vvith a Switoh Ina chine, an eleotro-responsive device fOToontTo1- 1ing said switoh Tnachine, a control oontaot for oontTo11ingSaid e1eotToTeSponSive devioe and iI1 cluded in al oontro1 oiTouit fo1'Sai(1 e1ectroe Sponsive device, and a Second oontact in Said contro1oircuit c1(Sed if Said oontro1 oontaot and Said SWitoh Inachine aSSuInenoncoTeSponding positions.

23. In coT1bination, a r1vvay Svvitch, contTo1- 1ing apparatos governedfTon1 a TeInote point fo caosing opeTations of said Svvitch, anindicating Telay oontrolled by said apparatuS and by Said Swito11 andenergized 01' deeneTgized accofd1ng aS the switoh doeS or doeS notTegiSte1, With the oondition of the appaatuS, a 1ocking Telay, and oacircuit vhich if n1onlentarily c1oSed a11ovS oon tro1 of said tTacksWitch and including a con taot conto11ed by Said locking Telay and abaok contaot of said indication I'elay in seTies.

2. n coInbination, a Tailvvay Svvitch, con tTo11ing apparatuS goveTnedfTom a TeInote Ioint foI' oauSing opeations of saiid Svvitc11, an iT1(1icating Telay controlled by said appaTotuS and by Said SWitoh 3I1(1enogied oT deenogized acoording as the SWitch does of does not TegiSte1'vvith the condition of the appaTatuS, a signa1 oontTo1 1ing trfc overSaid SWitch and alSo goveTned froIn Said TeInote point, and 1ockingmeanS e1- fe(=bive to peTnit opeTation of said svvitoh only if saidsignal haS been controlled t() indicate stop and said indication e1ay isdeenergized.

25. n oon1bination, a Tailvvay SWitch, oontTo1- 1ing apparatuS governedffon1 a ren10te point for oausing opeTations of Said SWitoh, anindicating Telay oontTo11ed by Said apparatuS and by Said Svitoh andenergized or deeneTgized acooTding aS the svitoh does or doeS notTegiSte Wit11 the condition of the appal'atus, a signa1 oontTo11ingt1'9vfTic over soid SWitch and a1So goveTned 1on1 Said Ten1ote point, anappToach section 1ocated in the TeaT of Suo11 5ignal, an approach10cking Te1ay oontToned in part by tra1c oonditionS in Said appToachseotion, and a cirouit vv11ich Inus be c1oSed n1on1entaTily at 1e3St topeTnit contTo1 of Said traok svvitoh and inoluding in series al con tactcloSed only if said ppToach 1ooking Telay assuInes one particulaTcondition and a contact of Said indioation Telay closed only if the indioation relay aSSuTneS itS deenergized oondition.

26. In coInbination, railway SWitch having nornla1 and TeveTSepoSitions, a nlanually oper able 1eveT hving noTn1a1 and TeveI'SepoSitionS, an indication relay, Ineans for energiing saio indioationTelay vVhen and only vvhen Said SWitoh and said leve1' oocupycorreSponding poSitions, IneanS fol' preventing operation of said SWitchuI11BSS Said Telay iS deenergized, and Signals foI' goveTning then1ovenent of tTao oveI' Sai switch contTolled by said indication Telay.

BANK l. DODGSON.

